Hypocrystalline PEEK (polyether-ether-ketone) porous membrane and preparation method thereof
A polyetheretherketone and porous membrane technology, which is applied in the field of semi-crystalline polyetheretherketone porous membrane and its preparation, can solve the problems that the gas separation membrane cannot be used normally, and the solvent resistance and high temperature resistance are not outstanding. Excellent solvent resistance, simple film-making process, and improved extraction efficiency
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Embodiment 1
[0025] (1) Mix 120g of polyetheretherketone and 280g of polyetherimide evenly, dry in an oven at 120°C for 5 hours, and extrude into granules with a twin-screw extruder to obtain polyetheretherketone / polyether Imide particles; the gradient temperatures at the twin-screw are: 280°C, 340°C, 350°C, 360°C, 350°C, 345°C;
[0026] (2) Add a slit film at the outlet of the twin-screw extruder, extrude the ether ether ketone / polyetherimide particles through the slit film to form a film, and then introduce it into three Roller calender is used for cooling and shaping to prepare polyetheretherketone / polyetherimide film; the gradient temperatures at the twin-screws are: 280°C, 340°C, 350°C, 360°C, 350°C, 345°C; The temperature of the slit film is 355°C; the temperature of the rollers of the three-roll calender is 190°C; during the extrusion process, when the roller speed is 2m / min, PEEK / PEEK with a thickness of 2mm and a width of 150mm can be prepared Imine mixture film; when the roll sp...
Embodiment 2
[0030] The masses of polyetheretherketone and polyetherimide in Example 1 were changed to 160g and 240g respectively, and the roller temperature of the three-roll calender was changed to 180°C. Repeat Example 1 to obtain a semi-crystalline polyetheretherketone porous membrane, marked as PEEK40. Figure 5 and Figure 6 SEM images of the surface and cross-section of PEEK40 are given. The characterization results are similar to Example 1.
Embodiment 3
[0032] The mass of polyetheretherketone and polyetherimide in Example 1 was changed to 80g and 320g respectively, the temperature of the slit film was changed to 350°C, the roller temperature of the three-roll calender was changed to 200°C, and the extraction The time was changed to 6 hours, and the volume fractions of N-methylpyrrolidone, ethanolamine, and distilled water in the extract were changed to 80%, 10%, and 10%, respectively. Repeat Example 1 to obtain a semi-crystalline polyether ether ketone porous membrane, marked as PEEK20. The characterization results are similar to Example 1.
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